Merchant-Ship-Photos exists for the exchange of merchant ship photographs of all eras.
Per Yahoo policy, you must own the copyright of, or have permission to reproduce, any photos you submit. If you took the photo, by definition and international law you own its copyright, unless taking the photo under a legal condition where the rights go to another entity, e.g. a USN official photograph taken by a USN photographer for non-personal reasons. USN official photos may be reproduced copyright-free as long as they are identified as USN official photos. Paintings of merchant ships of the pre-photography era are also allowed. Photos of unknown ships may also be submitted to identify. Sister group: http://groups.yahoo.com/group/warship-photos
Note that Yahoo no longer archives attachments. If you are not set to receive individual emails, you will not receive the pictures. Because of this fact, this group is under consideration to be retired until a more friendly host can be found.